// Copyright 2021 Wechat Group, Tencent
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once

#include <cstddef>
#include <string>
#include <tuple>

namespace tfcc {

class CUDADeviceProperty {
  size_t _maxThreadPerBlock;
  size_t _maxBlockPerGrimX, _maxBlockPerGrimY, _maxBlockPerGrimZ;
  size_t _totalGlobalMemory;

 public:
  explicit CUDADeviceProperty(unsigned deviceID);

  /**
   * return make_pair(blockCount, threadCount)
   */
  std::tuple<size_t, size_t> getSuitableKernelSize(size_t len) const;
  std::tuple<size_t, size_t> getSuitableKernelSize(size_t width, size_t height) const;

  std::string toString() const;

  size_t getTotalGlobalMemory() const;
};

}  // namespace tfcc
